>> reporter: that means that law enforcement officials have taken him. he is in police custody, diane. >> it could mean hospital, it could mean -- >> reporter: well, we know that they sent emergency personnel, medical personnel to the scene, which would be typical in a situation like this, not only for the suspect, but also for potential injuries to police, as well. >> all right, i want to go back to brian ross, because, brian, on the scene, do they now believe, and i know you do not know his condition yet, could be a spectrum of things, but has anybody suggested to you that they believe they may be able to get some information from him about how many involved, what else might have been planned? >> reporter: certainly if he's taken alive, then that sets him up for a trial on charges, most likely, of premeditated murder under federal law, as i understand it, that would be the plan, to try him under federal terrorism charges, not state murder charges. but that does open the possibility that he would be able to be questioned and reveal whether it was just h